Nissan GT-R (R35) · Service Manual RESTRAINTS

B1050, B1055 DRIVER AIRBAG MODULE

B1050 B1055

Description


For driver air bag module, crash is judged by main “G” sensor output signal and safing algorithm in front direction.
 
 OPERATION

In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by electric ignition system. The system burns the gas generating materials resulting in a chemical reaction. This generates hot gases that flow into the air bag through a filter and expand the bag.
 
 STRUCTURE

Driver air bag module mainly consists of air bag and inflator that inflates air bag.
 
 INSTALLATION

Driver air bag module is installed on the center of steering wheel with fixed bolts.

DTC Logic


DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
B1050
B1055
 		DRIVER AIRBAG MODULE
[VB-SHORT]
 		Driver air bag module circuit is shorted to some power supply circuit
(including the spiral cable)
  • Disconnection of wiring harness and short
  • Malfunction in driver air bag module
  • Malfunction in spiral cable
  • Malfunction in air bag diagnosis sensor unit

 
 DTC CONFIRMATION PROCEDURE

 
 1.CHECK SELF-DIAG RESULT

Diagnosis Procedure


■ WARNING ■
  • Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3 minutes. (To discharge backup capacitor.)
  • Never use unspecified tester or other measuring device.

 
 1.CHECK HARNESS CONNECTOR
 
 2.CHECK WIRING HARNESS
 
 3.CHECK SPIRAL CABLE CIRCUIT
 
 4.REPLACE DRIVER AIR BAG MODULE
 
 5.REPLACE AIR BAG DIAGNOSIS SENSOR UNIT